Which is the furthest place from the UK if travelling by car (only channel tunnel allowed). You cannot put your car on a ship or a plane (just the channel tunnel train). All high passes/snowbound roads can be taken as passable if they have a road for a car.
Theoretically you could drive anywhere in Europe, Africa or Asia. If you went in winter and drove across the frozen Arctic Sea you could reach anywhere in the Americas as well.
JNO you could cross over into Africa on land by Egypt.
However the question did mention a road so any hard snow over the artic does not count as it does not have a purpose built road that can take my Nissan primera.
So by my reckoning the furthest point reacheable by my Nissan is either the eastern most point of the former soviet union or the southern most tip of Africa. Dont know which will be the most miles.
Just had a bit of fun on google earth following the roads as far as i could and i was supprised to see that you could actually drive all the way to Singapore. And Jenstar's theory
is also very possible aswell. wouldnt like to pay the fuel bill though lol.
is there some way across the Suez canal, Dom Tuk? I've also been google earthing and can't see one, but I haven't been there in person and don't know. Same question about the Panama canal for those planning an outing to Tierra del Fuego.
I definitely saw a bridge of some sort, Dom Tuk, but only one (and of course didn't spot a tunnel). Anyway, it looks as if you're clear to drive to Cape Town.
The Bridge of the Americas crosses the Panama canal at the Panama City (Pacific) end. They were building another bridge near the continental divide when I was there 3 years ago, but don't know if it is open yet.
so to answer your question Dom Tuk... Can't find any exact road distances but I'd say Singapore and Cape Town via Suez were both about 12,000km away. Tierra del Fuego much further (from Portland Maine alone it's 10,000km) but impracticable without snow chains on your tyres, whale repellent, iceberg melters etc.
up by Alaska? I think it would depend on exactly where roads go - if there are any roads. I'm pretty sure you can get to Singapore by road, less sure about the Russian Far East